乙酸酐 、
24-O-methylsoyasapogenol B 以
吡啶 为溶剂,
反应 12.0h,
以20 mg的产率得到Acetic acid (4R,4aR,6aS,6bR,9S,10S,12aR,12bR,14bS)-10-acetoxy-9-methoxymethyl-2,2,4a,6a,6b,9,12a-heptamethyl-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-icosahydro-picen-4-yl ester